有机化学 ›› 2023, Vol. 43 ›› Issue (9): 3089-3097.DOI: 10.6023/cjoc202303023 上一篇    下一篇

综述与进展

β-巯基氨基酸的合成与应用

上官豪若a, 黄平b, 戴振亚a,*(), 王平b,*()   

  1. a 中国药科大学药学院 江苏南京 211100
    b 上海交通大学化学化工学院 上海市手性药物分子工程重点实验室 上海 200240
  • 收稿日期:2023-03-16 修回日期:2023-04-23 发布日期:2023-05-11
  • 基金资助:
    国家自然科学基金(22077080)

Synthesis and Application of β-Thiolated Amino Acids

Haoruo Shangguana, Ping Huangb, Zhenya Daia(), Ping Wangb()   

  1. a School of Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211100
    b Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2023-03-16 Revised:2023-04-23 Published:2023-05-11
  • Contact: E-mail: daizhenya@hotmail.com;wangp1@sjtu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(22077080)

自然化学连接(Native chemical ligation, NCL)是蛋白质化学合成中里程碑式的重要反应. 在温和的中性水相缓冲液中, 通过自然化学连接可以将N端为半胱氨酸的多肽与C端为硫酯的多肽连接合成带有修饰的蛋白质. 天然蛋白质的半胱氨酸丰度仅为1.7%, 导致难以找到合适的半胱氨酸反应位点, 阻碍了NCL的广泛应用. “自然化学连接-脱硫”的策略首次将连接位点拓展到丙氨酸, 启发了化学家们通过不同类型的β-巯基氨基酸来介导NCL反应, 随后通过脱硫反应可以得到天然多肽序列, 为蛋白质的合成提供更多选择. 近年来, 多个课题组完成了β-巯基苯丙氨酸、亮氨酸、精氨酸、天冬氨酸、天冬酰胺、赖氨酸、甲硫氨酸、色氨酸、谷氨酸和谷氨酰胺的合成, 并应用NCL-脱硫策略合成蛋白质. 将对上述β-巯基氨基酸合成与应用予以综述.

关键词: 自然化学连接, β-巯基氨基酸, 脱硫

Native chemical ligation (NCL) is a milestone reaction in protein chemical synthesis. The NCL involves a reaction between an unprotected peptide with C-terminal thioester and a second unprotected peptide with N-terminal cysteine, which could give a new peptide in a neutral aqueous buffer solution. The cysteine abundance of natural proteins is only 1.7%, which makes it difficult to find suitable cysteine reaction sites and hinders the widespread application of NCL. The “NCL-desulfuri- zation” strategy extended the ligation site to alanine, inspiring chemists to mediate NCL reactions through different types of β-thiolated amino acids. After the NCL is completed, native peptide can be obtained through desulfurization reactions. The “NCL-desulfurization” provides more options for protein synthesis. In recent years, several research groups have completed the synthesis of β-thiolated phenylalanine, leucine, arginine, aspartic acid, asparagine, lysine, methionine, tryptophan, glutamic acid and glutamine, and applied NCL-desulfurization strategy to synthesize proteins. In this article, the synthesis and application of the above β-thiolated amino acids are reviewed.

Key words: native chemical ligation (NCL), β-thiolated amino acids, desulfurization